Flexible joint for culverts.



APPLICATION FILED FEB.3, 1909.

Patented Aug. 1'7, 1909.

Q/vihmowo attozneqg the like.

i m TED sT TEs PATENT OFFICE.

JAMES DOYLE OF MADISON, WISCONSIN.

nnnxr'nmi .rom'r FOR OULVERTS.

To all whom it may concern.

Be it known that I, JAMES DOYLE, a citinen of the United States, residing at Madison, in the county of Dane and State of Wisconsin, 5- have invented certain new and useful Improvements in Flexible Joints for Culverts, of which the following is a specification, reference being had to the accompanying drawingls.

I 10 Y hlS invention relates to improvements in flexible joints for culverts, sewer pipes and The object of the invention is to provide .a simple and practical 'oint orconn'ection for the'seotions of a tu ular culvert or. pipe, whereby such sections may be flexibly or yieldably connected to prevent the culvert or pipe from breaking when the fillin around the same has beenwashedaway an a heavy load or strain is placedv u on' the same.

'With the above and 0t er objects in view,

' the invention consists of'the novel features of constructionand the combination and arra ement of parts 'hereinafter fully descri ed and claimed, and illustrated in the accompanying drawings, in which Fi ure 1 isa side elevation of a portion of a tubu ar culvert or pipe constructed in accordance with the invention; Fig. 2 is a de- Fig. .3 is a transverse. section; and Fig. 4 is a detail perspective view of one of the connectinglbands 'or joint sections. i

the "drawings 1 denotes the improved connecting bands or joint sections of a tubular culvert, pipe or the like composed of a plurality of sections 2. As illustrated, the atter are constructed-of sheet metal and are of cylindrical shape with transverse annular corrugations 3, but it will be understood that they may be of other form and construction. .Eachof the connecting sections'or bands 1 is also preferably formed from a single piece'of sheet metal bent into circular or cylindrical form with its ends suitably united and having its central portionsstampedor shapedto form an annular outwardly projecting corrugation 4 which is referabl V-shaped in cross section and w 'ch is o greater depth and size than the corru ations 3 in the pipe or culvert sections 2. he ends of the sec- Specification of Letters Patent. Application filed February 8, 1509. Serial No. 475,832:

tail longitudinal section, through the same;

Patented Aug. 17, 1909.

I tion 1" form longitudinally projecting annular "flanges 5-which are adapted to fit w thin the ends of the section 2 and to have'a limited longitudinal sliding movement therein, whereby the joint is made flexible or yielding to such an extentthat it will give under severe strain. This limited slidable connection between the flanges 5 and the ends of the culvert or pipe sections 2 is preferably effected by forming in the overlapping portions of said parts longitudinally extending slots 6 whichregister with each other and receive bolts, rivets or similar pins 7. It will be understood that any nuinber'of these slot and pin connections may be provided around the joint and that the slots'or openings 6 may be made longer. or shorter accordingto the amount of flexibility it is desired to' give the joint. The peculiar shape of the corrugation or rib 4 adds strength to the joint and the size and shape of the same also tend to retain the filling in which the culvert is embedded, around the same. Should, however, such filling wash away the flexibility of the joint will prevent damage to the'same when 7 it'is under a heavy load or strain.

Having thus described the invention what is claimed is: I v

1. A culvert comprising sections, a joint section arra ed between the first mentioned sections and aving portions to overlap the same and means arranged in said overlapping portions of the sections to prevent them from se arating and to permit them to have limited l each othe j 2. A culvert comprising sections and a joint section having portions to overlap the first mentioned section, said overlapping portions of the sections having slot and pin connections, whereby the joint is made flexible.-

connections whereby the joint isrendered flexible.

oligitudinal sliding movement upon 4. A culvert comprising tubular sections, a and means for limiting the sliding movement joint section arranged between the tubular sections and having at its ends flanges to ovcrla said tubular sections, the central portion 0 said joint section being formed with an annular. outwardly projecting corru ation, the overlapping) portions of the tub ar and joint sections eing slidably engaged,

of said overlappin portions upon eachother. 16 In testimony 'w liereof l hereunto afiix my 1 signature in the presence of two witnesses. JAMES DOYLE.

Witnesses: I

A. O. RUNKEL, ALMA STEINER. 

